is no more vfork support.
p4raw-id: //depot/perl@15494
usenm='true'
usemymalloc='n'
-usevfork='true'
useperlio='true'
d_eofnblk='define'
-d_fork='undef'
-d_vfork='define'
+d_fork='define'
groupstype='int'
# libs
# compiler & linker flags
# Respect command-line values.
-ccflags="$ccflags -DAMIGAOS -mstackextend"
+ccflags="$ccflags -DAMIGAOS -mstackextend -Dfork=ix_vfork_resume"
case "$optimize" in
'') optimize='-O2 -fomit-frame-pointer';;
esac